namespace Sentinel.Support.Converters
{
    using System;
    using System.Globalization;
    using System.Windows.Data;

    using Common.Logging;

    using Sentinel.Interfaces;

    public class MessageHasExceptionMetadataConverter : IValueConverter
    {
        private readonly ILog log = LogManager.GetLogger<MessageHasExceptionMetadataConverter>();

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            object exception = null;
            var entry = value as ILogEntry;
            if (entry?.MetaData != null)
            {
                entry.MetaData.TryGetValue("Exception", out exception);
            }

            return exception != null;
        }

        /// <summary>Converts a value.</summary>
        /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}